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Dennis Colleran is a Boston-born baseball talent with a strong college-to-pro story, having developed at Northeastern University before joining the Kansas City Royals organization. His profile blends authentic athlete credibility, family-and-relationship-driven personal content, and a grounded lifestyle that makes him a strong fit for brands looking to align with an emerging pro player.
I am well versed in many corners of my life outside of baseball. My social media draws a lot of attention, I intentionally keep my account public so all of my posts are sent around, expanding my reach beyond my followers, sometimes reaching up to 10,000 people.
Kansas City Royals
Northeastern University
United States
Professional photographer
FCBL Top Pitching Prospect
2021 Hockomock Baseball MVP
New to athlete partnerships? See how sports sponsorship works on OpenSponsorship.
1 post & 1 story with the Dennis Colleran promoting your product.
Long-term deal involving appearances, photoshoots, social media and more.
Have Dennis Colleran make a live appearance at your next event
Brands can sponsor Dennis Colleran on OpenSponsorship by creating a free account, browsing Dennis Colleran's profile, and sending a sponsorship proposal for social posts, appearances, or integrated campaigns. OpenSponsorship handles messaging, deliverables, and deal terms in one platform so you can connect directly with this athlete.
Dennis Colleran is listed on OpenSponsorship and available for brand sponsorships. Brands can review campaign packages, audience details, and pricing on this profile, then submit a proposal to start a partnership with this athlete.
According to OpenSponsorship, estimated pricing to sponsor Dennis Colleran starts at $100 for a social media post, $900 for a appearance and $600 for a brand ambassador campaign. Final rates depend on deliverables, usage rights, and campaign scope. Sign up on OpenSponsorship to view packages and send a proposal.
According to OpenSponsorship, Dennis Colleran's audience includes 2K+ Instagram followers, interests including Home Life, Pets, Fishing, Cars, Travel, based in Boston, Massachusetts, United States. Brands can use this profile to evaluate reach, content niche, and sponsorship fit before sending a proposal.

How do you measure influencer marketing ROI when half the numbers social media gives you are vanity metrics? It is the question brands ask us most, and it came up again when I joined Massimo Marinelli on the Berkida Ventures Podcast. After more than ten years and thousands of brand deals with athletes and creators at OpenSponsorship, here is how we think about it, and the framework we use with our clients.
October 28, 2026